Mitch Carson is a S. H. I. E. L. D. security agent under Dum Dum Dugan and someone whom O'Grady looks up to. During the "Enemy of the State" story, when Wolverine attacks the S. H. I. E. L. D. Helicarrier, Carson orders O'Grady and his roommate Chris McCarthy to guard Hank Pym and the new Ant-Man suit. Pym walks out and they panic and knock him out. McCarthy accidentally runs off with the suit to escape Wolverine, but when Elektra attacks the Helicarrier a month later, McCarthy is killed by a HYDRA agent and O'Grady steals the suit from his dead body. Instead of returning the suit, he uses it to steal stuff and peeps on the women's showers. When O'Grady joins fellow S. H. I. E. L. D. agent Veronica King, McCarthy's girlfriend, in mourning his death, they start a brief relationship, with Veronica getting pregnant. Carson, originally trained to be the stolen Ant-Man suit's wearer, was forced to wear a hastily built prototype suit and track down the thief. Carson is able to track down O'Grady, but in the ensuing battle, O'Grady disfigured Carson's face by accident with his suit's jets, burning the left half of Carson's face and leaving Carson deaf and blind on that side. O'Grady took Carson to a nearby infirmary, but Carson still vowed revenge.